A very sensitive instrument used to establish accurately the horizontal plane. It consists of a machined and scraped metal base with an involute groove or flat base. It has an adjustable or nonadjustable vial which may be graduated or plain. It has no mounting facilities.
Classification: Handtools (including glass cutters) and parts thereof, nesoi, of basemetal
NSN 6320-01-512-2031
NSN 5930-01-106-3686
NSN 6105-01-497-0507
NSN 5920-01-331-9148
NSN 6105-01-510-5312
NSN 5920-01-005-0161
NSN 5920-00-075-9904
NSN 5835-01-464-2662
NSN 5855-00-631-4565
NSN 6220-00-217-7054
NSN 5985-01-591-4487
NSN 6650-01-327-0323